학술논문
CMS pythia 8 colour reconnection tunes based on underlying-event data.
Document Type
article
Author
Tumasyan, A; Adam, W; Andrejkovic, JW; Bergauer, T; Chatterjee, S; Damanakis, K; Dragicevic, M; Valle, A Escalante Del; Frühwirth, R; Jeitler, M; Krammer, N; Lechner, L; Liko, D; Mikulec, I; Paulitsch, P; Pitters, FM; Schieck, J; Schöfbeck, R; Schwarz, D; Templ, S; Waltenberger, W; Wulz, C-E; Darwish, MR; De Wolf, EA; Janssen, T; Kello, T; Lelek, A; Sfar, H Rejeb; Mechelen, P Van; Putte, S Van; Remortel, N Van; Bols, ES; D'Hondt, J; Delcourt, M; Faham, H El; Lowette, S; Moortgat, S; Morton, A; Müller, D; Sahasransu, AR; Tavernier, S; Doninck, W Van; Vannerom, D; Beghin, D; Bilin, B; Clerbaux, B; De Lentdecker, G; Favart, L; Kalsi, AK; Lee, K; Mahdavikhorrami, M; Makarenko, I; Moureaux, L; Paredes, S; Pétré, L; Popov, A; Postiau, N; Starling, E; Thomas, L; Bemden, M Vanden; Velde, C Vander; Vanlaer, P; Cornelis, T; Dobur, D; Knolle, J; Lambrecht, L; Mestdach, G; Niedziela, M; Rendón, C; Roskas, C; Samalan, A; Skovpen, K; Tytgat, M; Vermassen, B; Wezenbeek, L; Benecke, A; Bethani, A; Bruno, G; Bury, F; Caputo, C; David, P; Delaere, C; Donertas, IS; Giammanco, A; Jaffel, K; Jain, Sa; Lemaitre, V; Mondal, K; Prisciandaro, J; Taliercio, A; Teklishyn, M; Tran, TT; Vischia, P; Wertz, S; Alves, GA; Hensel, C; Moraes, A; Teles, P Rebello; Júnior, WL Aldá; Pereira, M Alves Gallo
Source
The European physical journal. C, Particles and fields. 83(7)
Subject
Language
Abstract
New sets of parameter tunes for two of the colour reconnection models, quantum chromodynamics-inspired and gluon-move, implemented in the pythia 8 event generator, are obtained based on the default CMS pythia 8 underlying-event tune, CP5. Measurements sensitive to the underlying event performed by the CMS experiment at centre-of-mass energies s=7 and 13TeV, and by the CDF experiment at 1.96TeV are used to constrain the parameters of colour reconnection models and multiple-parton interactions simultaneously. The new colour reconnection tunes are compared with various measurements at 1.96, 7, 8, and 13TeV including measurements of the underlying-event, strange-particle multiplicities, jet substructure observables, jet shapes, and colour flow in top quark pair (tt¯) events. The new tunes are also used to estimate the uncertainty related to colour reconnection modelling in the top quark mass measurement using the decay products of tt¯ events in the semileptonic channel at 13TeV.